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Description:

Applying a magnetic field to a solid changes its thermal-transport properties. Although such magneto-thermal-transport phenomena are usually small effects, giant magneto-thermal resistance has recently been observed in spintronic materials and superconductors, opening up new possibilities in thermal management technologies. However, the thermal conductivity conventionally changes only when a magnetic field is applied due to the absence of nonvolatility, which limits potential applications of thermal switching devices. Here, we report the observation of nonvolatile thermal switching that changes the electron thermal conductivity when a magnetic field is applied and retains the value even when the field is turned off. This unconventional magneto-thermal switching arises in commercial Sn-Pb solders and is realized by phase-separated superconducting states and resultant nonuniform magnetic flux distributions. This result confirms the versatility of the observed phenomenon and aids the development of active solid-state thermal management devices.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: thermal switch, superconductor, magneto-thermal switching

Date published: 2024-03-15

Publisher: Springer Science and Business Media LLC

Journal:

• Communications Materials (ISSN: 26624443) vol. 5 34

Funding:

• MEXT | JST | Exploratory Research for Advanced Technology JPMJER2201

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s43246-024-00465-9

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Updated at: 2024-05-24 12:30:18 +0900

Published on MDR: 2024-05-24 12:30:18 +0900